A lightweight, prefabricated, assembled concrete roof panel

Abstract

The utility model discloses a light assembly type concrete prefabricated roof panel relates to prefabricated roof panel technical field. Including roof panel body, both sides of roof panel body are all provided with two insertion slot, and the adjacent two roof panel body that splices together is provided with the H type connecting piece, and the both sides of H type connecting piece two webs are respectively with corresponding two insertion slot adapt. The utility model is provided with H type connecting piece, and the insertion slot cooperation of both sides web and roof panel body is through, and utilizes the threaded connection of connecting screw rod and web who penetrates insertion hole, realizes the quick assembly of adjacent roof panel, and effectively promoted the stability of splicing structure, and the setting of water stop strip that meets water expansion, can meet water and expand seal at the splicing gap, avoids rainwater leakage.

Description

Technical Field

[0001] This utility model relates to the field of precast roof panel technology, specifically a lightweight precast concrete roof panel. Background Technology

[0002] With the popularization of prefabricated buildings, the application of precast concrete roof panels is becoming increasingly widespread. Lightweight concrete roof panels are mostly made of lightweight aggregates such as expanded clay, pumice, foam, and polystyrene particles, replacing traditional ordinary sand and gravel concrete. They have advantages such as light weight, high strength, and good thermal insulation performance.

[0003] Chinese utility model patent, authorization announcement number CN206299042U, discloses a lightweight precast concrete composite roof panel, including a waterproof reinforcement layer and a thermal insulation layer. The waterproof reinforcement layer is set on top of the thermal insulation layer, and steel mesh is set on both the top and bottom of the thermal insulation layer. In this design, the decorative surface layer, waterproof reinforcement layer, thermal insulation layer, and steel mesh are integrated to form a composite panel with good integrity; it is waterproof, anti-aging, and has a long service life; it has high strength and is not easily damaged during transportation; it reduces the need for prefabricated secondary openings and improves construction efficiency; it is suitable for widespread application.

[0004] However, existing lightweight precast concrete composite roof panels still have some technical defects. For example, the connection between panels relies on simple overlapping, resulting in insufficient overall structural stability and making it difficult to meet the requirements of modern buildings for construction quality and schedule. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight, prefabricated concrete roof panel to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a lightweight precast concrete roof panel, comprising a roof panel body, wherein two slots are provided on both sides of the roof panel body, and an I-shaped connector is provided between two adjacent roof panel bodies that are spliced ​​together, wherein two webs on one side of the I-shaped connector are respectively adapted to the two corresponding slots.

[0007] Each of the two web plates on each side has threaded holes, and each of the bottom sides of the roof panel body has insertion holes. Connecting screws are inserted into the insertion holes and are screwed to the two web plates on one side.

[0008] Preferably, the vertical contact surface between the slot and the web is provided with a water-swellable sealing strip.

[0009] Preferably, a water guide groove is formed between the top surfaces of two adjacent roof panel bodies and I-shaped connectors, and the sides of the roof panel bodies and the top surfaces of the I-shaped connectors located in the water guide groove are coated with an anti-corrosion coating.

[0010] Preferably, the roof panel body has two slopes in the top width direction.

[0011] Preferably, a waterproof membrane layer is laid on the top of the roof panel body.

[0012] Preferably, the roof panel body includes a lower panel and an upper panel, a hollow interlayer is formed between the lower panel and the upper panel, a number of vertical steel bars are fixed between the lower panel and the upper panel, transverse vertical steel bars are tied together with transverse binding steel bars, and longitudinal vertical steel bars are tied together with longitudinal binding steel bars.

[0013] Vertical reinforcing bars, horizontal binding reinforcing bars, and longitudinal binding reinforcing bars divide the hollow sandwich layer into multiple cavities, and thermal insulation core material is installed in the cavities.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This lightweight, precast concrete roof panel features I-beam connectors that engage with the panel body via slots on both sides of the web and are threaded into the web using connecting bolts. This allows for rapid assembly of adjacent roof panels, effectively improving the stability of the spliced ​​structure. The water-swellable sealing strip expands and seals the joints when exposed to water, preventing rainwater leakage.

[0016] The insulation core material is installed in the hollow interlayer, which reduces the overall weight of the roof panel and integrates the insulation core material into the roof panel body. This achieves deep integration of structure and insulation, enhances the thermal insulation performance and the connection stability of the insulation core material, and further improves the practicality of this lightweight precast concrete roof panel. Attached Figure Description

[0017] Figure 1 This is a connection diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the hollow sandwich structure of this utility model;

[0019] Figure 3 This is a schematic diagram showing the connection between the I-shaped connector of this utility model and the roof panel body.

[0020] In the diagram: 1. Roof panel body; 101. Lower panel; 102. Upper panel; 103. Slope; 2. Waterproof membrane layer; 3. I-shaped connector; 401. Vertical steel bar; 402. Horizontal binding steel bar; 5. Thermal insulation core material; 6. Connecting bolt; 7. Water-swellable waterstop strip; 8. Water guide channel. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1-3 As shown, this utility model provides a technical solution: a lightweight precast concrete roof panel, including a roof panel body 1, wherein the roof panel body 1 includes a continuously cast lower panel 101 and an upper panel 102, with a hollow interlayer formed between the lower panel 101 and the upper panel 102. Specifically, firstly, a three-dimensional mold is fixed, and then the mixed lightweight concrete (such as foamed cement) is first injected into the bottom of the mold and spread evenly. After initial setting, the lower panel 101 is formed. In one embodiment of this solution, several vertical steel bars 401 are then embedded on the upper surface of the lower panel 101 at a designed spacing to ensure that the bottom end of the steel bars is fully anchored to the concrete layer of the lower panel 101, or the vertical steel bars 401 are used as protruding steel bars of the lower panel 101, that is, as part of the steel cage of the lower panel 101, and are pre-embedded simultaneously when the lower panel 101 is poured.

[0023] like Figure 2 As shown, then horizontal binding steel bars 402 are tied between the horizontally adjacent vertical steel bars 401, and longitudinal binding steel bars are tied between the longitudinally adjacent vertical steel bars 401 to form a three-dimensional steel skeleton structure. At this time, the horizontal binding steel bars 402 and the longitudinal binding steel bars divide the hollow interlayer into multiple regular mouth-shaped cavities.

[0024] Next, prefabricated insulation core material 5 is installed in each cavity. The insulation core material 5 can be flame-retardant polystyrene foam board or rock wool board. The insulation core material 5 is initially fixed to the top surface of the lower panel 101 by adhesive or other fixing methods to ensure that the core material is in close contact with the top surface of the lower panel 101. Finally, lightweight concrete is poured into the mold to the design height to form the upper panel 102. After compaction, it is cured. After curing, the mold is removed to obtain the roof panel body 1 with insulation core material 5.

[0025] In this solution, the thermal insulation core material 5 is integrated inside the roof panel body 1, achieving deep integration of structure and insulation. The insulation effect and connection stability are far superior to the external insulation board of the existing technology.

[0026] like Figure 3As shown, an I-shaped connector is provided between two adjacent roof panel bodies 1 that are spliced ​​together. Specifically, two symmetrical slots are reserved on both sides of the roof panel body 1 by prefabrication mold. The cross-sectional dimensions of the slots are adapted to the thickness and width of the web of the I-shaped connector 3. At the same time, a groove for installing the water-swellable waterstop strip 7 is reserved on the vertical inner wall of the slot (i.e., the vertical contact surface between the slot and the web). The groove depth is 2-3mm and the width is consistent with the cross-sectional width of the waterstop strip. Threaded holes are opened on the two webs on each side. At the bottom of the side of the roof panel body 1, corresponding to the position of the threaded holes on the web, a vertical insertion hole is opened by drilling tools. The diameter of the insertion hole is slightly larger than the nominal diameter of the connecting screw 6 to ensure that the connecting screw 6 can be smoothly inserted and accurately connected with the threaded hole on the web.

[0027] When assembling adjacent roof panels, firstly, attach the water-swellable sealing strip 7 to the slot groove of the roof panel body 1 to be assembled. Then, align the two webs on one side of the I-shaped connector 3 with the slots of the adjacent roof panel body 1 and slowly insert them until the bottom of the web contacts the bottom surface of the slot. At this time, the other web of the I-shaped connector 3 naturally embeds into the corresponding slot of the other roof panel body 1. Next, insert the connecting screw 6 from the insertion hole on the side of the roof panel body 1 and use a wrench to rotate the connecting screw 6 to screw it into the threaded hole on the web. At this time, the two roof panel bodies 1 are fixed by the I-shaped connector 3.

[0028] After the splicing is completed, a water channel 8 is formed between the top surface of the adjacent roof panel body 1 and the top surface of the I-shaped connector 3. The depth is the height difference between the top surface of the roof panel body 1 and the top surface of the I-shaped connector 3. Then, an epoxy resin anti-corrosion coating is sprayed on the side of the roof panel body 1 and the top surface of the I-shaped connector 3 in the water channel 8. The coating thickness is not less than 0.2mm to ensure that the metal parts and concrete surface in the water channel 8 are protected from rainwater erosion.

[0029] To facilitate rapid rainwater drainage, the upper panel 102 of the roof panel body 1 is formed with two symmetrical slopes 103 in the width direction during casting using a mold. The slope of the slopes 103 is 2%-3%. The highest point of the two slopes 103 is located on the longitudinal center line of the roof panel body 1, and the lowest point is located on both sides of the roof panel body 1, which facilitates the collection of rainwater into the drainage channels 8 on both sides. Finally, a waterproof membrane layer 2 is laid on the surface of the upper panel 102. The waterproof membrane can be SBS modified bitumen waterproof membrane, which is applied by full adhesion method. The overlap width of the membrane is not less than 100mm, and the overlap joints are sealed by hot melt method to ensure the overall waterproof performance of the roof.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended embodiments and their equivalents.

Claims

1. A lightweight precast concrete roof panel, comprising a roof panel body (1), characterized in that: Two slots are provided on both sides of the roof panel body (1). An I-shaped connector (3) is provided between two adjacent roof panel bodies (1) spliced ​​together. The two webs on one side of the I-shaped connector (3) are respectively adapted to the two corresponding slots. Threaded holes are provided on both web plates on each side. Insertion holes are provided at the bottom of the side of the roof panel body (1). Connecting screws (6) are inserted into the insertion holes and are screwed to the two web plates on one side.

2. The lightweight precast concrete roof panel according to claim 1, characterized in that: The vertical contact surface between the slot and the web is provided with a water-swellable sealing strip (7).

3. A lightweight precast concrete roof panel according to claim 1, characterized in that: A water channel (8) is formed between the top surfaces of two adjacent roof panel bodies (1) and I-shaped connectors (3). The sides of the roof panel bodies (1) and the top surfaces of the I-shaped connectors (3) located in the water channel (8) are coated with an anti-corrosion coating.

4. A lightweight precast concrete roof panel according to claim 1, characterized in that: The roof panel body (1) has two slopes (103) in the top width direction.

5. A lightweight precast concrete roof panel according to claim 1, characterized in that: A waterproof membrane layer (2) is laid on top of the roof panel body (1).

6. A lightweight precast concrete roof panel according to claim 1, characterized in that: The roof panel body (1) includes a lower panel (101) and an upper panel (102). A hollow interlayer is formed between the lower panel (101) and the upper panel (102). Several vertical steel bars (401) are fixed between the lower panel (101) and the upper panel (102). Horizontal tie bars (402) are tied between the horizontal vertical steel bars (401), and longitudinal tie bars are tied between the longitudinal vertical steel bars (401). Vertical reinforcing bars (401), transverse binding reinforcing bars (402) and longitudinal binding reinforcing bars divide the hollow interlayer into multiple mouth-shaped cavities, and thermal insulation core material (5) is installed in the mouth-shaped cavities.

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